2,2-Dimethyl-propionic acid (2R,3S,6R)-6-[(2S,4R)-2,6-bis-(2,2-dimethyl-propionyloxy)-4-hydroxy-hexyl]-2-(2,2-dimethyl-propionyloxymethyl)-3,6-dihydro-2H-pyran-3-yl ester 在
碘 、
mercury(II) oxide 作用下,
以
四氯化碳 为溶剂,
以66%的产率得到2,2-Dimethyl-propionic acid (2R,4S,6S,8R,9S)-9-(2,2-dimethyl-propionyloxy)-2-[2-(2,2-dimethyl-propionyloxy)-ethyl]-8-(2,2-dimethyl-propionyloxymethyl)-1,7-dioxa-spiro[5.5]undec-10-en-4-yl ester